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avoid-unreachable-for-loop

v1.30.0
warning
effort: 2m
teams+

Warns when the if statement's condition makes the inner for-loop unreachable.

Unreachable for-loops will never be executed and should be either removed, or the condition should be updated.

Example​

❌ Bad:

void fn(List<int> arr) {
  // LINT: This condition makes the inner for loop unreachable.
  //  Try updating the condition or removing the whole if statement.
  if (arr.isEmpty) {
    for (final item in arr) {
      // ...
    }
  }

  // LINT: This condition makes the inner for loop unreachable.
  //  Try updating the condition or removing the whole if statement.
  if (arr.length == 0) {
    arr.forEach((_) {
      // ...
    });
  }
}

✅ Good:

void fn(List<int> arr) {
  for (final item in arr) {
    // ...
  }

  if (arr.isNotEmpty) {
    arr.forEach((_) {
      // ...
    });
  }
}
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